Adjustable shelf



FIG. 1 is a perspective top back view of the adjustable shelf of the present invention in expanded form;

FIG. 2 is a perspective bottom front view of the adjustable shelf of the present invention in expanded form;

FIG. 3 is a back side view of the adjustable shelf of the present invention in expanded form;

FIG. 4 is a front side view of the adjustable shelf of the present invention in expanded form;

FIG. 5 is a right side view of the adjustable shelf of the present invention in expanded form;

FIG. 6 is a left side view of the adjustable shelf of the present invention in expanded form;

FIG. 7 is a top side view of the adjustable shelf of the present invention in expanded form;

FIG. 8 is a bottom side view of the adjustable shelf of the present invention in expanded form;

FIG. 9 is a perspective top back view of the adjustable shelf of the present invention in collapsed form;

FIG. 10 is a perspective bottom front view of the adjustable shelf of the present invention in collapsed form;

FIG. 11 is a back side view of the adjustable shelf of the present invention in collapsed form;

FIG. 12 is a front side view of the adjustable shelf of the present invention in collapsed form;

FIG. 13 is a right side view of the adjustable shelf of the present invention in collapsed form;

FIG. 14 is a left side view of the adjustable shelf of the present invention in collapsed form;

FIG. 15 is a top side view of the adjustable shelf of the present invention in collapsed form; and,

FIG. 16 is a bottom side view of the adjustable shelf of the present invention in collapsed form. 

CLAIM The ornamental design for the adjustable shelf, as shown and described. 